The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1981
Filed:
Oct. 30, 1979
Applicant:
Inventors:
Martin A Beck, South Londonderry, VT (US);
John H Fabricius, Tyngsboro, MA (US);
Donald G Landis, Milford, NH (US);
Assignee:
BTU Engineering Corporation, North Billerica, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G05B / ;
U.S. Cl.
CPC ...
364477 ; 219486 ; 219497 ; 236 / ; 236 / ; 364120 ; 364107 ; 364557 ; 432 36 ;
Abstract
An automatic microprocessor-based control system for a diffusion furnace in which the controller is dedicated to a single associated diffusion tube to provide all monitoring and control functions necessary for a variety of diffusion processes. The controller provides direct digital control of time, temperature and gas flow, and can be readily operated with a variety of control algorithms.